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1. 发明授权

US4252983A Production of acetic anhydride and acetic acid from acetaldehyde 失效
标题翻译：从乙醛生产乙酸酐和乙酸
公开(公告)号：US4252983A
公开(公告)日：1981-02-24
申请号：US969102
申请日：1978-12-13
申请人： Heinz Erpenbach , Klaus Gehrmann , Alfred Hauser , Kurt Karrenbauer , Winfried Lork
发明人： Heinz Erpenbach , Klaus Gehrmann , Alfred Hauser , Kurt Karrenbauer , Winfried Lork
IPC分类号： B01J31/00 , C07B61/00 , C07C51/00 , C07C51/235 , C07C53/08 , C07C53/12 , C07C67/00
CPC分类号： C07C51/235
摘要： Acetic acid and acetic anhydride are produced continuously from acetaldehyde which is reacted by oxidizing it with gaseous oxygen in liquid phase in the presence of copper acylate and cobalt acylate as a catalyst and in the presence of an aliphatic carboxylic acid ester as a diluent. More specifically, the reaction is effected at temperatures of 62.degree. to 90.degree. C. over a period of less than 20 minutes with the use of the diluent and acetaldehyde in a quantitative ratio of 60:40 to 40:60; the resulting reaction products are delivered to a distilling zone in which the carboxylic acid ester and water are distilled off overhead and separated into two phases. Next, the organic phase is recycled with a reflux ratio of at least 1:1 to the distilling zone; base product accumulating in the distilling zone is delivered to an evaporating zone in which 2 to 12 parts by weight of an acetic acid/acetic anhydride-mixture as distillate are produced per part by weight of catalyst solution as base product.
摘要翻译：乙酸和乙酸酐是从乙醛连续生产的，该乙醛通过在酰化铜和催化剂钴作为催化剂存在下，在脂肪族羧酸酯作为稀释剂的存在下，以液相的气态氧氧化反应生成乙醛。更具体地，使用稀释剂和乙醛以60:40至40:60的定量比例，在低于20分钟的时间内，在62℃至90℃的温度下进行反应; 将所得反应产物输送到蒸馏区，其中将羧酸酯和水从塔顶馏出并分离成两相。接下来，有机相以至少1:1的回流比再循环到蒸馏区; 在蒸馏区积存的基础产物被输送到蒸发区，其中每重量份作为基础产物的催化剂溶液产生2至12重量份的作为馏出物的乙酸/乙酸酐混合物。

2. 发明授权

US5620567A Process for the removal of aldehydes and acetals from industrially prepared acetic acid 失效
标题翻译：从工业上制备的乙酸中除去醛和缩醛的方法
公开(公告)号：US5620567A
公开(公告)日：1997-04-15
申请号：US283280
申请日：1994-07-29
申请人： Andreas Seidel , Alfred Hauser , Peter Prinz
发明人： Andreas Seidel , Alfred Hauser , Peter Prinz
IPC分类号： C07C51/44 , C07C51/487 , C07C53/08 , B01D3/34
CPC分类号： C07C51/44 , C07C51/487
摘要： A process for the removal of aldehydes and acetals from industrially prepared acetic acid, wherein the contaminated acetic acid is reacted in the presence of a Bronstedt acid and 0.05 to 1% by weight of water and, if required, of 3 to 10 equivalents, calculated on aldehyde and acetal, of a high boiling polyhydric alcohol, and isolating the purified acetic acid by fractional distillation.
摘要翻译：一种用于从工业上制备的乙酸中除去醛和缩醛的方法，其中被污染的乙酸在Br + E，umI + EE n t酸和0.05-1％（重量）水的存在下反应，如果需要，按醛和缩醛计算为3至10当量的高沸点多元醇，并通过分馏分离纯化的乙酸。

3. 发明授权

US5306398A Process for the purification of waste acetic acid 失效
标题翻译：废乙酸净化方法
公开(公告)号：US5306398A
公开(公告)日：1994-04-26
申请号：US978905
申请日：1992-11-19
申请人： Andreas Seidel , Alfred Hauser , Erhard Jagers
发明人： Andreas Seidel , Alfred Hauser , Erhard Jagers
IPC分类号： C07C51/44 , C07C51/487 , C07C51/50 , C07C53/08 , B01D3/34
CPC分类号： C07C51/487
摘要： Waste acetic acid, which is contaminated by nitrogen compounds and also by hardly hydrolyzable halogen compounds, is purified by adding a complex-forming metal or one of the compounds thereof and a basic compound. The resultant mixture is kept at a temperature between 25.degree. and 118.degree. C. over a period of time of 1 to 6 hours. Finally, purified acetic acid is removed from the mixture by distilling.
摘要翻译：通过加入络合物形成金属或其一种化合物和碱性化合物来纯化被氮化合物污染并且难以水解的卤素化合物的废乙酸。将所得混合物在1至6小时的时间段内保持在25摄氏度至118摄氏度之间的温度。最后，通过蒸馏从混合物中除去纯化的乙酸。

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